* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    max-width: 1000px;
    width: 100%;
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 10px;
}

.subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.help-text {
    font-size: 12px;
    color: #6c757d;
    margin-top: 5px;
    text-align: center;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

input[type="text"] {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease;
    width: 100%;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.result {
    margin-top: 20px;
    padding: 20px;
    border-radius: 10px;
    text-align: left;
    display: none;
}

.result.success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.result.error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.notice {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
}

.footer {
    margin-top: 30px;
    color: #999;
    font-size: 14px;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #333;
}

.radio-label input[type="radio"] {
    margin-right: 8px;
    transform: scale(1.2);
}

.radio-text {
    user-select: none;
}

.radio-label.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.radio-label.disabled input[type="radio"] {
    cursor: not-allowed;
}